Watchcase-receiver.



W. O. BECK.

WATOHGASB RECEIVER.

APPLICATION TILED AUG. 10, 1910.

1,026, 1 96, Patented May 14, 1912.

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UNITED STATES PATENT OFFICE.

WILLIAM O. BECK, OF WEEHAWKEN, NEW JERSEY, ASSIGNOB TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

' WATCHOASE-RECEIVER.

Specification of Letters Patent.

Patented May 14, 1912.

Application filed August 10, 1910. Serial No. 576,481.

To all whom it may concern Be it known that I, WILLIAM 0. Been, citizen of the United States, residing at Weehawken, in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvement in YVatchcase- Receivers, of which the following is in full, clear, concise, and exact description.

This invention relatesv to telephone receivers of the watch case type and has for its object to provide in association with such receivers an improved and'simple binding post and mounting therefor which shall be entirely inclosed within the casing.

Briefly my invention-comprises, in a telephone receiver, the particular form of blnding post; the manner in which it Is attached to its mounting plate; and the method of securing the mounting plate within the casing, together with the provision of a common device which insures the stability of the mounting plate and secures the usual supporting eye to the exterior of the case.

One of the features ofmy invention relates to the combination of arts whereby the terminals of the magnetizing winding or helix may be secured to the binding posts and the binding posts to their supporting segment before the parts are assembled within the casing. I

The invention will be particularly described by reference to the accompanylng drawings, wherein Figure 1 is a plan view of a telephone receiver constructed in accordance with my in vention with the earpiece removed; F i 2 is a cross section'on the line 2-2 of Flg. 1; Fig. 3 is a sectional view on the line 33 of Fig. 1; and Fig. 4 is a side view showlng the method of securing the binding posts.

The same figures refer to corresponding parts in the several views.

The casing 1 is annular and may be formed in any suitable manner, preferably punched from sheet metal. embodiment of my invention, the casing acts as the permanent magnet and is therefore formed of mild sheet steel, the core 6 being permanently secured to the bottom of the casing, and the peripheral edge of the easing being folded back upon itself outwardly and threaded, thus providing a substantial seat for the diaphragm 2 and clamped thereto by the rubber earpiece 3.

The binding posts, 9, 10 are punchings of In the present U-form with solder lugs 20, 21 for the helix terminals and screw connections 18, 19 for the tips 16, 17' of the incoming conductors which are led through openings in the side of the casing in line with opemngs 13, 14 in the bindin posts. Each binding post 9, 10 has a num er of teeth or prongs 11, 12, by which it is attached in an upright position to a mounting of insulation 4, the teeth being forced through the insulation mounting from the upper side and clenched on the lower face. This bindim post mounting has an opening by which 1t 1s loosely fitted 0V8! core 6 and held against a second section of insulation 5 by the bobbin 7 which fits loosely over the lug and rests upon the mounting 4, a washer 8 driven over the knurled end of the core 6 serving to securely hold the insulating sections and coil in place. Both insulating plates 4 and 5 are segmental as shown, with their lower edges curved correspondingly with the interior of the casing to make a snug fit. To prevent the segments from turning about the core 6 as an axis, a screwv 22 inserted from the outside enters holes in said segments, the same screw serving also to attach the usual supporting eye 23 to the exterior of the casing. A pin 24 is driven through the eye above screw 22 and into the casing to prevent lateral movement of the eye.

By this construction the binding posts may be" secured to the segment 5 and the helix terminals secured to the solder lugs 20, 21 before the parts are laced in the casing. Furthermore, it is possil ile by merely removing the washer 8 from the knurled end of the core 6 to remove all of the parts from the receiver shell. This does away with fastening screws or bolts for the various parts and the advantage is obvious.

Having thus described my invention, I claim 1. A telephone receiver having a shallow annular casing, a segment of insulation mounted in Sflld casing, binding posts carried thereby, a core projecting from the bottom of the casin and extending through an opening in sai insulation, and a coil adapted to slip over said core into engagement with said insulation, said coil having its terminals secured to said binding posts.

2. A telephone receiver having a shallow annular metallic casing, a segment of insulation mounted in said casing, binding posts carried thereby, a core (projecting from the bottom of the casing an extending through an opening in said insulation, and a coil adapted to slip over saidcore and clamp said insulating segment to said casing, said coil binding posts carried thereby, an electro-' magnet within said casing, and a supporting eye, said eye being secured to the exterior of said casing by pin which projects through said casing and into said insulation segment. 7

4;. In a telephone receiver, the combination with an annularcasing, of a core secured to the end wall of said casing,a magnetizin helix adapted to slip over said core, an insu ating segment adapted to slip over said core, binding posts carried by said segment to which the terminalsof said helix are connected, and a single means for clamping both said helix and said segment in said casing.

5. In a telephone receiver, the combination with an annular casing, of a core secured to the end wall of said casing, a magnetizing helix adapted slip over said core, an insulating segment adapteo to slip over said core, binding posts carried by said segment to which the terminals of said helix are connected, and removable clam-ping means engaging said core to secure sai helix and said insulating segment in said casing. 3

6. In a telephone receiver, the combination with an annular metal casing, of a core secured to the end wall of said casing, a

ma etizing windin adapted to slip over sai core, an insulating segment adapted to slip over said core, binding posts secured to said segmentto which the terminals of said helix are connected, said bindin posts having clamping means extending t rough said insulating se ent, a second insulating seg- -ment adapte to be interposed between the wall of the casing and said first mentioned segment, and means engaging said core to secure said helix and insulating segments within said casing.

7. In a telephone receiver, the combination with an annular metal casing, of a core secured to the end wall of said casing, a magnetizing helix adapted to slip over said core, an insulating segment adapted to slip over said core, binding posts secured to said insulating segment to which the terminals of said helix are connected, a second'insulat-ing segment interposed between said first mentioned segment and-the end wall of said casing, means engaging said core for securing said helix and said segments in said casing, and means for holding said segments against rotation around said core.

8. In a telephone instrument, the combination with an annular metal casing, of a core secured to the end wall of said casing,

a magnetizing helix adapted to slip over said core, an insulating segment adapted to slip over said core and having an opening near one end thereof, binding posts secured to said. segment to which the terminals of said helix are secured, a second insulating segment interposed between said first mentioned segment and the end wall of said casing, said second segment having an opening adapted to be brought into alinement with the opening in said first mentioned segment, means engagingsaid core to.

secure said helix and said segments in said casing, a suspending member for said instrument, and a screw, for securing said suspending member to said casing, said screw passing through the end wall of said casing and entering the alined openings in said segments.

In witness whereof, I hereunto subscribe my name this 8th day of August A. D. 1910.

WILLIAM O. BECK.

Witnesses Invme MAoDo vALD, MoReAN WASHBURN, Jr. 

